What is the minimum visibility required for a visual approach in instrument flight rules (IFR)?

The minimum visibility required for a visual approach under IFR is indeed 3 statute miles. This requirement is established to ensure that pilots have adequate visual reference to navigate safely and execute an approach to landing. The rationale behind this 3 statute mile visibility requirement is to provide enough situational awareness for pilots, allowing them to visually identify the airport and approach path, thereby reducing the risk of an accident or loss of control during the critical phase of landing.

A visual approach can be initiated when the pilot is able to maintain visual contact with the airport and has received clearance from air traffic control. Meeting the minimum visibility ensures that pilots are in a position to make timely decisions regarding their descent and landing, especially in terms of avoiding obstacles and assessing runway conditions. The precise visibility standard directly contributes to aviation safety and operational efficiency during landing procedures under IFR.